Preheat a large oven-safe skillet (like cast iron) over medium-high heat.

Add the ground beef to the skillet and sprinkle with steak seasoning. Reduce heat to medium and cook until browned and fully cooked.

While the beef is cooking, heat olive oil in a separate skillet over medium heat. Add the peppers, onions, and mushrooms. Sauté until tender.

Combine the sautéed vegetables with the cooked beef and mix well.

Top the mixture with provolone and shredded gruyere or swiss cheese.

Place the skillet under the broiler until the cheese is melted and lightly browned.

Serve hot on its own, over lettuce, in low-carb wraps, or with hoagie rolls if not following low-carb. Freeze leftovers in individual portions for easy meals.